Go Back
A single, perfectly cut square of a banana bread brownie on a white plate, highlighting the marbled brownie and banana bread layers.

Banana Bread Brownies: The Ultimate Fudgy & Moist Recipe

The ultimate dessert mashup! These Banana Bread Brownies feature a rich, fudgy brownie base swirled with a perfectly moist and flavorful banana bread layer. An easy and decadent treat for any occasion.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 16 brownies
Course: Dessert, Snack
Cuisine: American
Calories: 195
Ingredients Equipment Method Notes

Ingredients
  

For the Brownie Batter
  • 1/2 cup unsalted butter melted
  • 1/2 cup granulated sugar
  • 1/2 cup brown sugar packed
  • 2 large eggs room temperature
  • 4 oz semi-sweet chocolate chopped
  • 1/2 cup all-purpose flour
  • 1/4 cup unsweetened cocoa powder
  • 1/4 tsp salt
  • 1 tsp vanilla extract
For the Banana Bread Batter
  • 2 large ripe bananas mashed (about 1 cup)
  • 1 large egg
  • 1/4 cup unsalted butter melted
  • 1/4 cup brown sugar packed
  • 1/2 cup all-purpose flour
  • 1/2 tsp ground cinnamon
  • 1/4 tsp baking soda

Equipment

  • 1 8x8 inch baking pan
  • 2 Mixing bowls
  • 1 Whisk

Method
 

  1. Preheat your oven to 350°F (175°C). Grease an 8x8 inch baking pan and line it with parchment paper, leaving an overhang on two sides.
  2. Prepare the Brownie Batter: In a microwave-safe bowl, melt 1/2 cup butter and the semi-sweet chocolate together until smooth.
  3. In a large bowl, whisk together the granulated sugar, 1/2 cup brown sugar, and 2 eggs. Stir in the vanilla extract and the melted chocolate mixture.
  4. Gently fold in 1/2 cup all-purpose flour, the cocoa powder, and salt until just combined. Do not overmix.
  5. Prepare the Banana Bread Batter: In a separate medium bowl, mash the ripe bananas. Add the egg, 1/4 cup melted butter, 1/4 cup brown sugar, and cinnamon, and mix well.
  6. Gently stir in 1/2 cup flour and the baking soda until just incorporated.
  7. Assemble: Pour about two-thirds of the brownie batter into the prepared pan. Dollop the banana bread batter over the top, followed by the remaining brownie batter.
  8. Use a knife to gently swirl the batters together for a marbled effect.
  9. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with moist crumbs. The center should be just set.
  10. Cool completely in the pan before lifting out with the parchment paper handles and slicing into 16 squares.

Notes

For the fudgiest texture, be careful not to overbake the brownies. They should still be slightly soft in the center when you remove them from the oven.
Allowing the brownies to cool completely is essential for clean cuts and the perfect fudgy consistency.